KR19980024317A - Transmission of the gearbox - Google Patents

Abstract

In gear transmissions of transmission gearboxes, actuators arranged to move only axially with respect to the housing, selection actuators, transmission actuators, auxiliary transmissions for converting rotational movements into reciprocating movements, connecting and disconnecting with brakes connected to the selection actuators The lockable device is capable of being arranged such that two of the three actuators are fixedly disposed by movement with respect to each other and are connected to the third actuator by an auxiliary transmission, and the selection actuator is fixedly or axially rotated relative to the housing. It is immovably fixed.

Description

Transmission of the gearbox

The invention relates to a transmission for a transmission gearbox according to the preamble of claim 1.

A gear-shifting device of the type described above is the subject of the old German patent application 196 10 104.2.

In the transmission, the selection control sleeve is arranged coaxially with the transmission control shaft and is connected to the transmission control shaft by an auxiliary transmission in the form of a gate / gate pin, the transmission control shaft being axially pistoned by a rod-shaped actuator. It is connected to a pressurized medium servomotor in form, and an electromagnet is used to actuate a brake acting on the selection control sleeve. The selection control sleeve is immovably fixed with respect to the housing in the longitudinal direction of the central axis, and the shift control shaft is fixed by a latch at a predetermined rotation angle position on each shift gate to shift one or two gears. In the gear-shifting device according to the old patent application, the shift control shaft performs a linear actuating motion reciprocating around the intermediate position, thereby skipping at least one intermediate gear and alternating the brake of the actuating control sleeve when passing through the intermediate position. Connect and disconnect. When the gear is skipped, the shift control shaft is in constant free movement to reduce the impact between the synchronizing device imparted to the gear by the shift control shaft.

DE 41 37 142 A1 discloses another type of gear transmission in which an electric motor is connected to a gear transmission rod by a helical gear combination that converts rotational motion into a reciprocating motion. It is arranged to be able to move only in the axial direction at the connecting position of the brake, but it is arranged to be able to move and rotate axially with respect to the housing in the separated position of the brake. The gear-shift rod is directly connected to the motor shaft of the electric motor by means of coupling parts which can be connected to and separated from the brake in the opposite direction. In switching between selection and shifting, the coupling part and the brake must be placed upside down and the electric motor must be stopped.

DE 43 09 027 A1 represents another type of gear-shifting device, wherein a gear-shifting shaft which is arranged to be rotatable and axially movable with respect to the press-medium cylinder is adapted to shift gears. -By the first axial piston of the pressurized-medium cylinder directly in the direction of the transmission shaft.

With the aid of an auxiliary transmission for converting the reciprocating motion into a rotational motion about the gear-shift shaft axis, the second axial piston of the press-medium cylinder causes the gear-shift shaft to perform rotational motion to select the shift gate. do.

It is an object of the present invention for a gear-shifting device of the type described above to skip at least one intermediate gear when shifting from a current gear to a new gear without any particular free movement of the shifting actuator. This object is achieved by the features described in claim 1 herein.

In the gear-shifting device according to the invention, when operated in the rotational-angular position associated with a new gear, the shifting actuator is held in a non-operational state by means of a fixing device in the longitudinal direction of the central axis of the housing, so that during a shifting operation, To reduce the impact between the synchronizing devices-no specific free movement of the shifting actuator is required. Because the linear motion required to select the new rotation angle position is only performed by a third actuator arranged to be able to move only axially with respect to the housing.

The dependent claims 2 to 4, 8 and 9 relate to an advantageous configuration of the gear-shifting device according to the invention.

Dependent claims 5 to 7 relate to an advantageous embodiment of the gear transmission according to the invention.

The invention is illustrated in detail by the three embodiments shown in the drawings.

1 shows a gear transmission according to a first embodiment of the present invention, in the form of an axial cross section including a central axis.

FIG. 2 shows a gear transmission according to a second embodiment of the present invention, shown in the form of an axial cross section including a central axis.

3 is a cross sectional view of the gear-shifting apparatus seen along line III-III of FIG. 2;

4 is a view showing a gear transmission according to a third embodiment of the present invention, showing a partial cross section including a central axis.

FIG. 5 is a partial longitudinal sectional view of the gear-shifting device viewed along the line V-V of FIG.

6 is a gear-shift diagram for the operation of a shift actuator in a gear-shift device according to the invention.

* Code Description

8 ... housing 9 ... shifting actuator

10 ... optional actuator 12 ... locking device

13 ... brake 14 ... auxiliary transmission

15 ... displacement sensor 17, 28 ... servo motor

18 ... brake connection member 19 .. locking connection member

21, 22, 23 ... Groove 24 ... Differential lever

25, 26 ... linkage 29 ... piston

31 ... guidance 33 ... bulge

The following describes three embodiments shown in Figs. 1 to 5 for a gear-shifting device according to the invention;

The pressurized medium servo motor 28 is provided with a variable speed actuator 9 in the form of a shaft, a selective actuator 10 in the form of a hollow shaft sleeve, a rod actuator 11 and a double-acting axial piston 29. It is arranged coaxially with the central axis of the box housing (8).

The shift actuator 9 is made to be fixed by the movement with respect to the selection actuator 10, or it is made in one piece. By means of an auxiliary transmission 14 in the form of a helical gear combination for converting the reciprocating motion into a rotary motion, the selection actuator 10 is connected to the actuator 11, which actuates it with respect to the housing 8. It is arranged to be fixedly connected by movement toward the axial piston 29 so that it can only move in the axial direction.

The shifting actuator 9 can be operated in a rotational angle position (FIG. 3), on which the axial groove 21 lies on the reference surface 30-30 of the housing 8 on the outer circumference of the selection actuator 10. The reference plane comprises a central axis 7-7. The axial groove 21 selects the forward gears 3 and 4 so that the battery gears 3 and 4 are connected or disconnected by operating the shift actuator 9 at the rotational angle position in the direction of the central axis 7-7. Are assigned to the shift gates 3-4 for connection.

The variable speed actuator 9 can be operated at a different rotational angle position (FIG. 3), on which the axial groove 22 lies on the reference plane 30-30 on the outer circumference of the selection actuator 10. In the direction of the central axis 7-7, the axial groove 22 is used to move the forward gears 1, 2 so that the forward gears 1, 2 are connected and disconnected by operating the shifting actuator 9, which is placed at the rotational angle position. ) Is placed in the shift gate 1-2 to selectively shift.

The shifting actuator 9 can be operated in a third rotational angle position (FIG. 3), in which the axial groove 23 at the outer periphery of the axial actuator 10 at the outer periphery of the selection actuator 10 is the reference plane 30-30. ) By operating the shift actuator 9 at the rotational angle position in the direction of the center axis 7-7, the axial groove 23 is used to move the forward gears 5, 6 to the forward gears 5, 6. Is given to the shift gate 5-6 to selectively shift.

In order to operate the shifting actuator 9 at each rotational angle position, the selection actuator 10 is connected to the housing 8 in the direction of the central axis 7-7 by means of a locking device 12 that can be detached and connected. The locking connecting member 19 is connected to the circumferential groove 20 at the outer circumference of the selection actuator 10 so that the selection actuator is fixed so that the selection actuator is fixed so as not to be movable only in the axial direction.

In order to operate the shifting actuator 9 in the direction of the center axis 7-7 to shift the gear, the locking device 12 is disconnected and the brake 13 connected to the selection actuator 10 is connected, and the brake connection The member 18 passes through the axial grooves 21, 22, 23 which are respectively positioned on the reference planes 30-30 so as to be rotatably fixed relative to the selection actuator 10 but not axially movable.

The axial piston 29 has a reciprocating position 16, in which the shift actuator 9 is in the stop position 16, the neutral select gate 0-0 and the shift gate 3- shown in FIG. It is centered by the feedback spring when the transition between four. In the stop position 16 *, the shift actuator 9 is placed in the rotation-angular position of the conversion gate 3-4, and the brake connecting member 18 passes through the associated axial groove 21.

The displacement sensor 15, which represents the reciprocating position 16, allows the locking device 12 and the brake 13 to operate only at the reciprocating position 16 of the axial piston 29. Combined with a device for controlling 17.

In the first embodiment of the gear transmission according to FIG. 1, the circumferential groove 20 of the locking device 12 is an axial groove 21-of the brake 13 in the longitudinal direction of the central axis 7-7. Split with respect to 23, the brake connecting member 18 is connected to the locking connecting member 19 by means of a differential lever 24 articulated with respect to the housing 8 in the central region.

In the second embodiment of the gear-shifting device shown in FIGS. 2 and 3, the circumferential groove 20 of the locking device 12 is an axial groove 21 of the brake 13 with respect to the central axis 7-7. -23) and the brake connecting member 18 and the locking connecting member 19, which are disposed opposite to each other, are connected to each other by a hoop-shaped linking device 25, 26 surrounding the selection actuator 10. Is guided to move in parallel with the reference plane (30-30) in the guide device 31 in the form of a fly fixed by the movement to the housing (8).

In the third embodiment of the gear transmission shown in FIG. 4, the circumferential grooves 20 of the locking device 12 and the axial grooves 21-23 of the brake 13 are the reference planes 27 of the selection actuator 10. -27), the plane perpendicular to the central axis 7-7. The axial grooves 21-23 are arranged in the angle of rotation region covered by the circumferential groove 20, where the position 32 ^* represents the length of the rope corresponding to the curve size of the angle of rotation-angle region.

The circumferential groove 20 is disposed radially outward with respect to the axial grooves 21-23, in the radial bulge 33 of the selection actuator 10. The brake connecting member 18 of the brake 13 and the locking connecting member 19 of the locking device 12 are structurally coupled to form a common connecting member 18, 19, and circumferential groove by the link device 34. (20) or axial grooves (21-23) can be connected in turn and connected to the servomotor (17) of the brake (13).

In three embodiments of the gear-shifting device, the locking device 12, the brake 13 and the servomotor (such as the locking device 12) are arranged such that the selection actuator 10 is fixedly rotatable relative to the housing 8 or axially movable. 17) are coupled by a linkage between them.

The method of operation of the gear-shifting apparatus according to the invention is described below with reference to the gear-shifting sequence.

When shifting from the second gear to the third gear, the shifting actuator 9 is placed in the rotation-angular position with the axial groove 22 assigned to the conversion gate 12 disposed on the reference surface 30-30 and the brake The connecting member 18 can be accommodated. By operating the servo motor 28 in the reciprocating position 16, the second gear is disconnected and the shift actuator 9 moves to the shift gate 0-0 in the direction of the center axis 7-7.

Upon reaching the reciprocating position 16, the displacement sensor 15 turns the servomotor 17 of the brake 13 so that the selection actuator 10 is centered relative to the housing 8 by the locking device 12. It is fixed in the longitudinal direction of the shaft 7-7. The continuous control operation of the actuator 11 by the servomotor 28 causes the rotational movement of the shifting actuator 9 to the rotational angle position. The axial groove 21 applied to the conversion gate 3-4 has a reference plane 30. Is set to -30. When the shifting actuator 9 has reached the rotation-angular position, the servomotor 17 is switched again, such that the brake connecting member 18 is connected to the axial groove 21 and the locking connecting member 19 is a circumferential groove. Separated at 20. When the servomotor 17 has reached this position, the shift actuator 9 is operated by the servomotor 28 in the direction of the center axis 7-7, beyond the selection gate 0- 0, and thus the third gear. Is connected.

According to the invention, the gear-shifting device can skip at least one intermediate gear when shifting from the current gear to the new gear without any particular free movement of the shifting actuator.

Claims (9)

A shift actuator rotatably and axially movable about a central axis of the housing, A selection actuator coaxially with the central axis and arranged to rotate about the housing, An actuator arranged coaxially with the central axis so as to be movable only in the axial direction with respect to the housing, A device for securing the selection actuator to the housing in the longitudinal direction of the central axis, A connectable and detachable brake for securing the select actuator to the housing in the circumferential direction of the central axis, An auxiliary transmission for converting the reciprocating motion into a rotational motion, wherein two of the three actuators are aligned and connected to the third actuator by the auxiliary transmission in the longitudinal direction of the central axis, so as to be fixed by movement relative to each other; In the gear transmission of the variable speed gearbox, Locking device 12 connectable and detachable so that selection actuator 10 can be secured relative to housing 8 only in the circumferential direction or only in the longitudinal direction of central axis 7-7 is selected actuator 10. And the selection actuator 10 is connected by means of an auxiliary transmission 14 to an actuator 11 which is connected to the brake 13 and to the actuator 13 and is arranged to be movable only in the axial direction with respect to the housing 8. gearbox. Gear-shifting device according to claim 1, characterized in that a helical gear combination is used for the auxiliary transmission (14). 3. The sensor (15) according to claim 1 or 2, wherein the sensor (15) is used for an intermediate position (16) of the actuator (11) aligned so as to be movable only in the axial direction with respect to the housing (8). Gear shifting, characterized in that it interacts with a servomotor (17) actuating a brake (13) so that it can be connected and disconnected only in position (16) in position (11). 4. The selection actuator (10) according to any one of the preceding claims, wherein the selection actuator (10) comprises a circumferential groove (20) having a central axis (7-7) at its center and to which the locking connection member (19) of the locking device (12) is connected. And the member is fixedly arranged in motion with respect to the brake connecting member (18) capable of connecting and disconnecting the brake (13). 5. The circumferential groove (20 in FIG. 1) is placed side by side in the longitudinal direction of the central axis (7-7) with respect to the axial groove (21-23) of the selection actuator (10) and brakes in the axial groove. The connecting member 18 may be connected, and the brake connecting member 18 and the locking connecting member 19 may be connected by means of a differential lever 24 mounted in the center area so as to rotate relative to the housing 8. Characterized by a gear transmission. 5. A circumferential groove (5) according to claim 4, wherein the circumferential grooves (20 in FIGS. 2 and 3) are aligned opposite to the axial grooves (21-23) of the selection actuator (10) and axial grooves. The brake connecting member 18 can be connected, and the brake connecting member 18 and the locking connecting member 19 are connected by at least one hoop-shaped linking device 25, 26 surrounding the selection actuator 10. Gear transmission, characterized in that. 5. The brake connecting member 18 can be connected in an axial groove, wherein the axial grooves 21-23 and the circumferential grooves (20 in FIGS. 4 and 5) of the selection actuator 10 are selected actuators (5). 10, the reference plane 27-27 is perpendicular to the central axis 7-7, and the axial grooves 21-23 are in the circumferential groove 20 Lies within the rotational-angle region covered by the circumferential groove 20, which is arranged radially outward with respect to the axial grooves 21-23, and the common connecting member 18, 19 is provided with the brake connecting member 18 and Gear shifting device, characterized in that it is used for a locking connection member (19). 8. Actuator (11) according to one of the preceding claims, characterized in that the actuator (11) arranged to be movable only in the axial direction with respect to the housing (8) is connected to the axial-piston pressurized-medium servomotor (28). Gear transmission. 10. Gear-shifting device according to one of the claims 3 to 8, characterized in that the electromagnet is used for the servomotor (17) of the brake (13).